diff options
| author | Matt Carlson <mcarlson@broadcom.com> | 2008-11-03 16:56:29 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-11-03 16:56:29 -0800 |
| commit | 042a75b99fbda6bf7c7bf4496e205e3e7acc953a (patch) | |
| tree | cc30c7d2df02300f78782f86b30f64b968cdc054 /drivers/net/phy | |
| parent | 5e0c676c717316f315dcf76da52dc0002c43632a (diff) | |
broadcom: Refine expansion register access routine
This patch makes the expansion register access routines a little more
formal. They will be used by the following bcm50610 support patch.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy')
| -rw-r--r-- | drivers/net/phy/broadcom.c | 60 |
1 files changed, 34 insertions, 26 deletions
diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c index 0fe37492feb..7e935924793 100644 --- a/drivers/net/phy/broadcom.c +++ b/drivers/net/phy/broadcom.c @@ -128,36 +128,35 @@ static int bcm54xx_shadow_write(struct phy_device *phydev, u16 shadow, u16 val) MII_BCM54XX_SHD_DATA(val)); } -/* - * Indirect register access functions for the Expansion Registers - * and Secondary SerDes registers (when sec_serdes=1). - */ -static int bcm54xx_exp_read(struct phy_device *phydev, - int sec_serdes, u8 regnum) +/* Indirect register access functions for the Expansion Registers */ +static int bcm54xx_exp_read(struct phy_device *phydev, u8 regnum) { int val; - phy_write(phydev, MII_BCM54XX_EXP_SEL, - (sec_serdes ? MII_BCM54XX_EXP_SEL_SSD : - MII_BCM54XX_EXP_SEL_ER) | - regnum); + val = phy_write(phydev, MII_BCM54XX_EXP_SEL, regnum); + if (val < 0) + return val; + val = phy_read(phydev, MII_BCM54XX_EXP_DATA); - phy_write(phydev, MII_BCM54XX_EXP_SEL, regnum); + + /* Restore default value. It's O.K. if this write fails. */ + phy_write(phydev, MII_BCM54XX_EXP_SEL, 0); return val; } -static int bcm54xx_exp_write(struct phy_device *phydev, - int sec_serdes, u8 regnum, u16 val) +static int bcm54xx_exp_write(struct phy_device *phydev, u8 regnum, u16 val) { int ret; - phy_write(phydev, MII_BCM54XX_EXP_SEL, - (sec_serdes ? MII_BCM54XX_EXP_SEL_SSD : - MII_BCM54XX_EXP_SEL_ER) | - regnum); + ret = phy_write(phydev, MII_BCM54XX_EXP_SEL, regnum); + if (ret < 0) + return ret; + ret = phy_write(phydev, MII_BCM54XX_EXP_DATA, val); - phy_write(phydev, MII_BCM54XX_EXP_SEL, regnum); + + /* Restore default value. It's O.K. if this write fails. */ + phy_write(phydev, MII_BCM54XX_EXP_SEL, 0); return ret; } @@ -205,18 +204,27 @@ static int bcm5482_config_init(struct phy_device *phydev) /* * Enable SGMII slave mode and auto-detection */ - reg = bcm54xx_exp_read(phydev, 1, BCM5482_SSD_SGMII_SLAVE); - bcm54xx_exp_write(phydev, 1, BCM5482_SSD_SGMII_SLAVE, - reg | - BCM5482_SSD_SGMII_SLAVE_EN | - BCM5482_SSD_SGMII_SLAVE_AD); + reg = BCM5482_SSD_SGMII_SLAVE | MII_BCM54XX_EXP_SEL_SSD; + err = bcm54xx_exp_read(phydev, reg); + if (err < 0) + return err; + err = bcm54xx_exp_write(phydev, reg, err | + BCM5482_SSD_SGMII_SLAVE_EN | + BCM5482_SSD_SGMII_SLAVE_AD); + if (err < 0) + return err; /* * Disable secondary SerDes powerdown */ - reg = bcm54xx_exp_read(phydev, 1, BCM5482_SSD_1000BX_CTL); - bcm54xx_exp_write(phydev, 1, BCM5482_SSD_1000BX_CTL, - reg & ~BCM5482_SSD_1000BX_CTL_PWRDOWN); + reg = BCM5482_SSD_1000BX_CTL | MII_BCM54XX_EXP_SEL_SSD; + err = bcm54xx_exp_read(phydev, reg); + if (err < 0) + return err; + err = bcm54xx_exp_write(phydev, reg, + err & ~BCM5482_SSD_1000BX_CTL_PWRDOWN); + if (err < 0) + return err; /* * Select 1000BASE-X register set (primary SerDes) |